Electrochemical Performance Enhancement of Micro-Sized Porous Si by Integrating with Nano-Sn and Carbonaceous Materials

Overview

Journal Materials (Basel)

Publisher MDPI

Date 2021 Mar 6

PMID 33672033

Citations 1

Authors

Tiantian Yang

Hangjun Ying

Shunlong Zhang

Jianli Wang

Zhao Zhang

Wei-Qiang Han

Affiliations

Soon will be listed here.

Abstract

Silicon is investigated as one of the most prospective anode materials for next generation lithium ion batteries due to its superior theoretical capacity (3580 mAh g), but its commercial application is hindered by its inferior dynamic property and poor cyclic performance. Herein, we presented a facile method for preparing silicon/tin@graphite-amorphous carbon (Si/Sn@G-C) composite through hydrolyzing of SnCl on etched Fe-Si alloys, followed by ball milling mixture and carbon pyrolysis reduction processes. Structural characterization indicates that the nano-Sn decorated porous Si particles are coated by graphite and amorphous carbon. The addition of nano-Sn and carbonaceous materials can effectively improve the dynamic performance and the structure stability of the composite. As a result, it exhibits an initial columbic efficiency of 79% and a stable specific capacity of 825.5 mAh g after 300 cycles at a current density of 1 A g. Besides, the Si/Sn@G-C composite exerts enhanced rate performance with 445 mAh g retention at 5 A g. This work provides an approach to improve the electrochemical performance of Si anode materials through reasonable compositing with elements from the same family.

Citing Articles

Silicon/Graphite/Amorphous Carbon as Anode Materials for Lithium Secondary Batteries.

Duan H, Xu H, Wu Q, Zhu L, Zhang Y, Yin B Molecules. 2023; 28(2).

PMID: 36677522 PMC: 9865035. DOI: 10.3390/molecules28020464.

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